AMS Smart Spool Core (Rev. A)

This model has been superseeded, please check the latest revision here. Why another one? There are many holders for silica gel beads and other desiccants, many others can be used to add weight and avoid the spools jumping around in the AMS. Do we really need another one? I believe the two concepts can be merged and also the user experience can be improved and this is my attempt. What's different? First, this container is not aimed solely at Bambulab spools: it's compatible with any spool having a centre hole of at least 48mm and a width not greater than 68mm, practically any spool that can fit inside the AMS. Spools, which cannot accommodate common desiccant containers because of the tabs on the sides, are not a problem anymore: yeah, I'm talking about those Overture cardboard spools and the infamous Amazon Basic ones…. Second, I'm trading off a little silica gel to increase the spool weight: I suggest using M6 bolts and nuts, but you can use whatever means you find appropriate. I meas